Watch Jimmy Fallon, Idina Menzel, and the Roots Take 'Let It Go' to Class

'Frozen' star joins 'Tonight Show' crew to perform Oscar Best Original Song with kids' instruments

Frozen's inspirational hit "Let It Go" won the Oscar for Best Original Song on March 2, but now its cultural ubiquity has really been confirmed. Idina Menzel, who sang in Rent on Broadway and won a Tony for originating the lead role in the musical Wicked, joined Jimmy Fallon and the Roots for a joyous rendition of the song on what The Tonight Show bills as "classroom instruments." She follows Robin Thicke's "Blurred Lines,"Carly Rae Jepsen's "Call Me Maybe," and Mariah Carey's "All I Want for Christmas Is You" in getting the former Late Night crew's accompaniment on kazoos, xylophones, and the like. With Casio blips at one point bringing to mind Trio's Volkswagen-viral hit "Da Da Da," and Menzel breaking out in laughter, it's a goofy take on a pretty serious song (the cold never bothered them anyway). If we didn't get to see Karen O or Pharrell accept an Academy Award, this goes a little — or, hell, long — way toward easing the blow. John Travolta didn't bother her, anyway.